AN/GRR-5 the Angry 5

AN/GRR-5 Receiver. The “Angry 5”

This is a radio I picked up at an antique radio swap in 2018. Picked it up with a box of cables and mismatched misc parts, so I decided to revive it from the dead. This is an AN/GRR-5 or better known as an Angry 5. It tunes 1.5 to 18 Mhz, receives AM, CW and SSB. The neat thing about this radio is that it runs on 120 V AC or 6, 12, 0r 24 VDC. That’s what the bottom unit (the power supply, PP-308) is for. It contains two vibrators and four transformers, along with a relay and some tubes. The top unit (R-174) is the actual receiver, which is tuned by turning the large dial in the center. The little white dots visible around the left hand side of the dial are actually “presets”. They are small locking studs that work like the buttons on a car radio to physically detent the dial at 10 locations, allowing the operator to preset his favorite stations. The white rectangle is for recording band and station information for each preset.

My radio needed some capacitors replaced, power supply tweaked, and a good scrubbing. Mine is dated 1952 so most likely Korean War era. This set is very solidly built, and heavy! 70 lbs! This radio is an example of what happens when usability and ruggedness are given priority and production cost is forgotten. Pam found this one on a table at the antique radio swap meet in Madison and called me over, and I had to have it! I had found a lot of other military gear but the SOB either had his prices obscenely high or would not sell anything! Anyway here it is.

Receiver Tubes

Tube Type Function
V1 1L4 1st RF Amplifier
V2 1L4 2nd RF Amplifier
V3 1R5 Converter
V4 1L4 1st IF Amplifier
V5 1R5 2nd IF amplifier/Cal.osc.
V6 1U5 Detector/AVC/AF amplifier
V7 1R5 Low AF amplifier/BFO
V8 3V4 High AF amplfier

Power Supply Tubes

Tube Type Function
V101 6AG7 B+ voltage regulator
V102 CK1007 High voltage rectifier
V103 0B2 Reference voltage regulator
V104 6AG7 Filament voltage regulator

And since I own an M37, here are Locations to mount radios in the bed of the truck